Home / 28,133.60-42,212.05-12,330.45

Finding the Fourth Proportional to 28,133.60, 42,212.05 and 12,330.45

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Solution

The fourth proportional to 28,133.60, 42,212.05 and 12,330.45 is: 18,500.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,133.60 : 42,212.05 = 12,330.45 : x
  2. Step 2: Convert to fraction form
    28,133.60/42,212.05 = 12,330.45/x
  3. Step 3: Cross multiply
    28,133.60x = 42,212.05 × 12,330.45
  4. Step 4: Simplify right side
    28,133.60x = 520,493,541.10
  5. Step 5: Solve for x
    x = 520,493,541.10/28,133.60
  6. Step 6: Final answer
    x = 18,500.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.